Case IH 10 – Electronic Instrument Cluster (EIC): Memory Retention Error of Battery Calibration Constant

The instrument cluster is failing to retain the baseline voltage calibration data in its non-volatile memory, or it is reading a voltage that is drastically out of sync with the actual battery voltage.

• MXM
• MXM 120
• MXM 130
• MXM 140
• MXM 155
• MXM 175
• MXM 190
• Puma Series

1. 1

   Check battery health to ensure it is fully charged and in good condition, as weak batteries or voltage fluctuations can trigger false ICU memory errors.

2. 2

   Perform a Voltage Comparison Test by turning the key on, navigating the instrument panel display to show system voltage, measuring the voltage directly across the battery terminals with a multimeter, and comparing the two readings.

1. 1

   Evaluate voltage test results

   Evaluate the results of the Voltage Comparison Test.

2. 2

   Check voltage difference

   If the voltage reading on the instrument panel differs from the actual battery voltmeter reading by more than 2.0 volts, the internal memory/calibration of the cluster has failed.

3. 3

   Remove instrument panel

   Remove and replace the instrument panel.

4. 4

   Install new panel

   Install the new instrument panel.

5. 5

   Verify voltage display

   Turn the key start to ON and recheck the voltage display to ensure the new panel is reading the battery voltage correctly. (Note: Disconnecting the battery to attempt a 'hard reset' is generally ineffective for this specific memory retention hardware failure).